Aktualizovat du2/program.c

du2/program.c

@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_NAME_LEN 101
+#define LIST_SIZE 1000
+
+struct pizza {
+    char name[MAX_NAME_LEN];
+    float price;
+    };
+
+int read_item(struct pizza* item) {
+    char buffer[256];
+
+    if (fgets(buffer, sizeof(buffer), stdin) == NULL)// назва
+        return 0;
+
+    buffer[strcspn(buffer, "\n")] = '\0'; // забір пропусків
+    if (strlen(buffer) == 0)
+        return 0;
+
+    strncpy(item->name, buffer, MAX_NAME_LEN);
+    item->name[MAX_NAME_LEN - 1] = '\0';
+    if (fgets(buffer, sizeof(buffer), stdin) == NULL)// ціна
+        return 0;
+
+    buffer[strcspn(buffer, "\n")] = '\0';
+    char* endptr;
+    item->price = strtof(buffer, &endptr);
+    while (*endptr == ' ') endptr++;
+
+    if (*endptr != '\0') return 0; // некоректне число
+
+    return 1;}
+
+int read_pizza_list(struct pizza* list) {
+    int counter = 0;
+
+    for (int i = 0; i < LIST_SIZE; i++) {
+        struct pizza item;
+        memset(&item, 0, sizeof(struct pizza));
+
+        int r = read_item(&item);
+        if (r) {
+            memcpy(&list[i], &item, sizeof(struct pizza));
+            counter += 1;
+        } else {
+            break;
+        }
+    }
+
+    return counter;}
+
+
+    int compare_pizza(const void* a, const void* b) {
+        const struct pizza* p1 = (const struct pizza*)a;
+        const struct pizza* p2 = (const struct pizza*)b;
+        if (p1->price < p2->price) return -1;
+        if (p1->price > p2->price) return 1;
+        return strcmp(p1->name, p2->name);}
+
+int main() {
+    struct pizza list[LIST_SIZE];
+    memset(list, 0, LIST_SIZE * sizeof(struct pizza));
+    int count = read_pizza_list(list);
+
+    qsort(list, count, sizeof(struct pizza), compare_pizza);
+    for (int i = 0; i < count; i++) {
+        printf("%s\n%.6f\n", list[i].name, list[i].price);}
+
+    return 0;}